7-8 Model 3772/3771 Condensation Particle Counter
READ commands are used to read parameter from the instrument (flow
rates, pressures, temperatures, etc.). READ commands can be identified
by a leading "R".
SET commands set an internal parameter to the value(s) supplied with
the command. Supplied parameters are always delimited by a “<,>”. SET
commands can be identified by a leading "S". The instrument will reply to
all set commands with the string “OK” <CR>.
MISC (MISCELLANEOUS) commands will be used for calibration and
SMPS mostly.
HELP commands. A list of firmware commands are accessible using the
HELP command sent to Serial 1 of the CPC. The firmware commands
are also listed in Appendix B. The commands can be used to read CPC
data, instrument statuses, set instrument operating parameters, and
send and receive data from another instrument attached to the Serial 2
port.
The instrument will reply with a serial string of "ERROR", if a command
was not understood.
To use the HELP commands and the firmware commands, a program
capable of sending and receiving ASCII text commands can be used. A
terminal program such as “HyperTerminal” (supplied with Windows
®
) is
appropriate.
Connect to Serial 1 of the Model 3772/3771 CPC and perform the following
steps:
1. Open the HyperTerminal program by selecting:
Start|Programs|Accessories|Communications|
HyperTerminal.
2. Enter a name for the connection, for example, TSI-3772.
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